Why does the Mercedes-Benz ML not respond when shifting gears?

[MacIsaac]

Mercedes-Benz ML not responding when shifting gears is due to issues with the gear shift module and its wiring. Solution: Replace the entire gear shift mechanical assembly. Because the plastic buckle that locks the gear shift lever does not have separate spare parts available, the entire gear shift mechanical assembly needs to be replaced. This results in higher repair costs. Additionally, after replacing the gear shift mechanical assembly, since the electronic gear selection module (ESM) is inside it, a Mercedes-Benz specialized computer must be used for coding. Otherwise, even after replacing the gear shift mechanical assembly, the gears cannot be shifted. At service stations and repair shops with specialized computers, this repair method is generally adopted. Types of gear shift modules: Mercedes-Benz electronic gear shift lever modules can be basically divided into two types: ESM and ISM. ESM (Electronic selector module) adopts the traditional gear shift lever form, operating the gear shift through mechanical transmission connections. The gear shift lever module is usually located in the central saddle area. ISM (Intelligent servo module) adopts a gear selection switch to control the gear shift module, completing the gear shift process by operating the direct gear selection switch (S16/13) and the direct gear selection intelligent servo module.

[DiHarper]

I've been driving a Mercedes ML for several years, and that time when the gear wouldn't engage was really frustrating—the car just wouldn't move. Looking back, it was probably due to insufficient transmission fluid. The automatic transmission in the Mercedes ML heavily relies on electronic control, and if the oil pressure is low or a sensor malfunctions, the gear won't engage. At the time, I tried pressing the brake to check if the light came on—fortunately, it did, meaning the brake switch was fine. Later, using a multimeter to test the voltage, I discovered a blown fuse. After replacing the fuse, the gear engaged properly. My advice: first, check the dashboard for any error codes. If there aren't any, inspect the fuses and fluid levels. Don't wait stubbornly like I did—tow it for repairs immediately, or you'll risk costly transmission damage. Key maintenance tips for this Mercedes model: change the fluid every two years and pay extra attention to the electrical system.

[MacCassidy]

Stay calm and analyze the situation when encountering gear shift failure. Common causes of electronic gear shift system malfunctions in Mercedes ML include incomplete transmission of brake signals. Proper gear shifting requires stable brake pedal engagement - if the brake sensor or wiring has poor contact, the gear may get stuck. It could also be caused by internal wear in the shift lever module. I've dealt with similar issues myself: first try restarting the vehicle's computer by disconnecting the power, which might temporarily restore connection. If that doesn't work, check the fuse box in the engine compartment and try replacing the gear shift-related fuses. Don't forget to check battery voltage, as power deficiency can cause all electronic functions to fail. The Mercedes ML has strict design requirements, so it's recommended to visit a specialized repair shop for fault code scanning rather than attempting DIY repairs that might damage the control unit. While such faults aren't overly complex to repair, they do require professional tools.

[HaleyFitz]

If the gear shift doesn't respond, immediately pull over and turn on hazard lights. This situation may occur in Mercedes ML due to transmission control module failure. First, confirm the car is in P gear and restart, then firmly press the brake and try shifting again. If ineffective, check for abnormal indicator lights on the dashboard. Avoid forcing operations as it may damage the transmission. Mercedes ML repair costs are high, so it's recommended to contact a tow truck for professional inspection. Safety first, avoid blocking traffic.